Dimensional Fund Advisors Administrative Assistant interview questions

Initially I was contacted for a phone interview. After the phone interview with HR she asked when I could come in for an interview and gave one day in particular that would work best for the people I would be interviewing with. So I figured it was going to be a group interview and told her I that day would be fine but I would prefer something in the early morning/late afternoon so I didn’t have to take too much time off from my current job. Later I was sent the itinerary with who I would be interviewing with — 8:30am-12:15pm with about 8 back-to-back interviews. Not very considerate of my time or warning me that it would actually take a whole half day. Once I interviewed everyone was very nice except for an events woman.